Typewriter



March 12, 1940. w, EjgEL-r 2,193,511

' mmrgsn l Filed nay 1934 .svsheets-sneet 1 fllg. 1

March 12,1940.v w. E-,SELT 2,193,511

' TYPEWRITER v Findlay 25. 1934 l s 'sheets-sheet 2 @y 8 1sY Matth 12,1940. I wrgisEL-r 2,193,511

-A mnwnunn Filed lmay 25. 1934 5 sheets-sheet s fly. 10

gifle Marh12,194o. 5,5m I. 2,193,511

TYPEWRITER l Filed May 25, 1934 5 shets-sheet 5 Y i Si w 1S s? f ma o n11 F Q 115 Q1 x Y INI ',:hdl`l/l-. Q I N 1:2-:f Q u Patented Mar. 12,1940 j l2,193,511 A PATENT OFFICE mEwm'rEa Willy Eiselt, Siegmar,Germany, assignor to' Wanderer-Werke vorm. Winklhofer & JaenickeAkt.-Ges., Schonau-Chemnitz, Germany Application May 25, 1934, serialNo. '127,565

In Germany May 30, 1933 4 Claims.

This invention relates to typewriters, vmore particularly to a mechanismfor the stepwise spacing operation of the paper carriage of typewriters,whereby the size of the steps is variable.

An object of the present invention resides in the provision of amechanism for the stepwise operation of the' paper carriage, whereby thesize of the steps is variable as is particularly required in typewritersfor oriental languages which have lll characters of dilerent widths.

In the known typewriters of this type it is not possible to change thesteps of the paper carriage without vfundamentally changing the machine.For the slightest modication of the once fixed l5 keyboard extensivechanges must'be made which are expensive because many parts of themachine l must be remade. This is of particular disadvantage when tryingto adapt a conventional model of typewriter for all oriental languagesbecause' the great variety of these languages and of sets of charactersrequires various modications of the keyboard. Also the user of atypewriter often desires to change certain type characters so that themachine must be provided with different key arrangements.

It is an object of this invention to avoid these disadvantages and toprovide an improved typewriter which can be easily made to t for anyidiom or keyboard of oriental languages.

It is another object of this invention to provide an improved typewriterin which the dierent spacing movements of the paper carriage can bereadily effected.

Further and other objects of the present in- $5 vention will behereinafter set forth in the accompanying specication and claims andshown in the drawings which, by way of illustration, show what I nowVconsider to be a preferred embodiment of my invention.

In the drawings which illustrate an embodiment of my invention by way ofexample, *only such parts of the typewriter are shown as are essentialfor disclosing my invention. Other known parts of typewriters which arenot essen- 45 tial for illustrating my invention have been omitted inorder to simplify the disclosure.

In the drawings: Fig. 1 is a top VView o'f the keyboard and key levers.

50 Figs. 2, 3, 4 and 5 -are side views of four dierently acting keylevers and the coacting abutment andrbails.

Fig. 6 is a part cross sectional view through the machine with the papercarriage in the lower case shift position.

(Cl. 19T-84) Figs. 7, 8 and 9 diagrammatically show the .cooperation ofthe key levers with the different abutment and transmission members whenoperating-individual groups of keys and when the paper carriage is inthe lower case shift position. 5

Fig. 10 is a part cross sectional view through the machine with thepaper carriage in the upper case shift` position.

Figs. l1 and 12 are individual illustrations corresponding to Figs. 7, 8and 9 but showing the l0 coaction of the individual parts when the papercarriage is in its upper case shift position.

Fig. 13 is a part cross sectional rear view of the` escapement mechanismand transmission members with the machine in rest position.

Fig. 14 isa rear view of the escapement mechanism showing the movableescapement pawl swung in multi-step position.

Fig. 15 is a partial section through the machine with a position of theparts corresponding to Fig. 9, showing the type lever drive intypeprinting position and the operation of the type levers on' thecarriage spacing mechanism, and the case shift mechanism.

In all figures like numerals indicate like parts.

As apparent from Figs. 6 and 10 of the drawings, a case shiftV frame 2is movably connected to the machine frame I and guided by means of aslot 3 which engages pins 4 which are xed to the typewriter frame I.This case shift frame 30.

can be set at one or more elevations as'compared with the base positionby means of case Shift keys 'l0 indicated in Fig. l and'not particularlyshown becausethey are well known in the art of making typewriters. Theshift frame 2 is pro- 35 vided with guides 5 for the longitudinalmovement ofthe carriage 6. The carriage 6 whichv carries the writingcylinder orplaten 'l is provided with a rack ll, which cooperates withthe gear S connected to an escapement Wheel l ll, and 40' is, stepwisemoved by the action of the carriage pulling spring not shown, the stepscorresponding to the width of the characters.

'Ihe carriage spacing mechanism consists substantially of an escapementpawl vcarrying body Il which can rock about an axis 5l in the. caseshift frame 2 and which carriers a fixed pawl I2 and a movableescapement pawl I4. These escapement pawls cooperate successively duringthe rocking of the body l I about its axis 5l, with 50 the teeth of theescapement wheel I0. When the paper carriage is stationary, the movablepawl I4 engages the escapement wheel I0 which is urged by the usualcarriage pull spring in anticlockwise direction, Fig. 13, but isprevented from movement of the body ,II about the axis 51 always takesplace in the same manner and has no inuence on the spacing l"distance ofthe carriage. The-spacinglstep is eected in the following marinera.'indiennne body Il rocks about its axis 51 in clockwise direction, Figs.6 and 10. the fixed pawl I2 first engages the escapement wheel I andholds the same, whereupon further rocking of the body II in clockwisedirection brings the movable pawl I4 out of enga ement with theescapement wheel. After the movable pawl I4 has come out of engagementwith the wheel I0, it is rocked by the action of the spring I3, Figs. 13and 14, about its pivot 58 in the body II, in anti-clockwise direction.k'I'his rocking move ment of the movable pawl I4 about its pivot 58determines the length of the spacing step, and it is dependent on thesetting position of the abutment I 6 against which the pawl I4 strikesunder the action of its spring I3. The pawl body II, therefore,immediately after the end of' its clockwise movement, Figs. 6 and 10,111which the movable pawl I4 came out of engagement with the escapementwheel, returns to the position shown in Figs. 6 and 10 in which thefixed pawl I2 is again out of engagement with the escape-1 ment wheelI0, and the movable pawl' I4 is in engagement with said wheel. Since,however, meanwhile the movable pawl has been rocked about its pivot 58to the extent of a single or a plurality of teeth divisions according tothe position of the abutment IS, the movable pawl I4 engages a differenttooth of the escapernent wheel I0, after the iixed pawl has againreleased the wheel I0, is rocked into its original position under theaction of the escapement wheel which is under the tension of thecarriage pull spring, and the spring I3 is tensioned, this positionbeing shown in Fig. 13 in full lines andthe arm E39 then lying againstthe stop 60. The movable escapement pawl I4 thus permits a rotation ofthe escapement wheel Il! corresponding to the magnitude of its previousleft-hand shift about its pivot 58, Figs. 13 and 14. The essential thingfor obtaining a spacing step movement of the paper carriage is thus theknown to-and-fro rocking escapement body II and the also knownescapement pawls I2 and I4. To obtain a spacing ac-a tion, the body IImust rock to and fro once about its axis 51.

v The individual end position of the pawl I4, i. e., the choice of therst, second or one of the consecutive gaps according to the desired sizeof the steps of the movement of the paper carriage, is determined by theadjustable vabutment I5 against which the pawl I4 abuts under the actionof spring I3. Abutment I6 is held by means of spring 41 in a positionwhich corresponds to the shortest step of the paper carriage 6, i. e.,to the smallest swing of the pawl I4; spring 41 is built considerablystronger than the spring I3 which acts on the movable pawl I4.

In the embodiment of my invention herein described, two sizes of stepsof the paper carriage movement are shown, namely, a single and a doublestep, and the case ,shift is effected' by raising the whole papercarriage, but the invention is illustrated as applied to such a machinemerely by way'of example.

All keylevers 25, viz., 25a, 25h, 25e and 25d transmission andintermediate members.

have support arms 21 by means of which tney are hung on a common shaft26 extending across all key levers. The levers are swung around thisshaft when the corresponding keys 28 are depressed against the action ofthe draw I springs 5I which are connected to the rear ends 28 of the keylevers 25. All this is obvious from Figs. 1 to 5, inclusive.

, Fig. 1 illustrates the arrangement of key levers 25 and a conventionalkeyboard. yIn addition to l0 keys 28 for the individual characters, theback space 1I, the two case shift keys 10 and the case shift lock 12 areshown. The machine is further provided with one or several dead keys 28ewhich do not actuate the control mechanism.

On actuating the type key 28d the key lever 25d is rocked about theshaft 26, Hereby the type lever 64 is moved into striking positionthrough-the links 6I, 62 and the bell crank 53, in which position thetype strikes against the platen roller 1. During the striking movementof the type lever 64, a projection 65 thereon moves the universal bar 66which extends transversely to the direction of the movement of all thetype levers 64. The movement of the universal bar 66 is transmittedthrough a transmission member 81 jointed to the machine frame by meansof an intermediate member 6d, to a projection 58 on the transmissionmember 61, which projection actuates a pin 50 on the pawl body II, inboth case shift positions.. Thereby the pawl body II which is mounted onthe case shift 'frame 2 is pivoted about the axis 51 (Figs. 13 and 14).The movement of the universal bar 66 and the parts' 61, 68, 6 9connected thereto, also the rocking of the pawl body in clockwisedirection in Fig. 15, take place against the action of springs, notshown in the drawings. which also eiect the returning movement when thetype lever 64 returns to the initial position under the action of thekey lever restoring spring 5I.

The case shift is effected by pressing the case shift key 1G. Hereby thecase shift key lever 13 is rocked about a pivot pin 15 whereby aprojection 14 on said lever raises the case shift frame 2 'along withthe paper carriage 6 and platen 1.

In order to produce, besides the customary single length step, anotherof double length in one or both positions of the paper carriage, in thepresent ease and according to the present invention, three differenttypes of abutment members are provided, each of which is exchangeablyconnected with an individual key lever 25h, 25e or 25d, whereas noabutment members are connected to the group of key levers 25a nor to thedead keys 28e. The arrangement cf these abutment members and theirdistribution over the individual key levers 25 may be made differentlyaccording to the dsired keyfboard without fundamentally changing theprinciples of the machine. Changes can easily be made, even on the fullyassembled machine, if a diierent arrangement of characters on the typelevers and on the key-board is desired because, for this purpose, onlythe abutment members associated with the individual key levers 25 needbe exchanged. lAccording to the present invention, when typing, theseabutment members influence the adjustable abutment I6 for the movablepawl I4 by means of The diierent possibilities of such influencing willbe hereafter described individually.`

On depressing the keys 28a which are associn with additional abutmentmembers.

atedwith characters of normal width, the escapement mechanism of thepaper carriage is actuated in the conventional manner so that thecarriage 6 in the upper and lower case shift position is advanced withthe normal step width. The key levers 25a have the conventional form asis obvious from Fig. 2 and are not provided The movable pawl I4 is freedon swinging the pawl body II and is moved by the action of spring I3from the position indicated by solid lines in Fig. 13 into the positionindicated by dashes and dots in the same figure in which position it isheld by the abutment I6 which is under the influence of spring 41.

'On operation of a key associated with a character of greater width, themovable pawl I4 is swung further from the position indicated by solidlines in Fig. 13 into the position shown in Fig. 14 so that a doublestepis accomplished.

In order to obtain a double width step in both positions of the papercarriage with certain selective keys 23h, abutment members are mountedon the ends 2S oi the corresponding key levers 25h. In this case, theseabutment member consist of screwed on or riveted on little plates 30h. nswinging the key levers 25h by operating the keys 28h, the plates 30hact in both case shift positions ofthe paper carriage on a transmissionmember, .rail or rod 32 which extends across all key levers 25 andis farenough away from the rear ends 23 of the key levers 25 to remainuntouched by the ends 29 when the key levers 25a, 25e and 25d, whichhaveno such little plates, are operated. As more particularly obvious fromFigs. 6` to 12inclusive, the transmission member 32 is mounted on levers34 which are fulcrumed at 33 to the machine frame I. Anarm 35 providedon one of the levers 34 is movably linked by a connecting rod 35 to onearm 22 of 'a setting device 20--2I-22 which is preferably crumed to thebolt 49. Upon operation of the transmission member 32 by means of thelittle' plates 30h of the key levers 25h, the elbow-lever 34-35 and withit the setting device 20-2 I-22 is moved counterclockwise (Figs. 6 and'7). With the air of the intermediate members I9, I8, 48, the abutmentbody I and with it the abutment I6 is swung from the position shown inFig. 13 into the position shown in Fig. 14, whereby the desired doublewidth step of the paper carriage 5 is obtained. Since the transmissionmember 32 with the levers 34 is rotatably carried by the machine frameI, only the positionk of the setting device 2li-2I--22 which isrotatably supported by the case shift frame l2 is changed with respectto the .elbow-lever 34-35 when shifting the paper carriage 6 with theplaten 'I from the lower case shift position (Fig. 6) to the upper caseshift position (Fig. Hereby the connection of lever arm 35 and settingdevice arm 22 is maintained by means of the connecting rod 36 which ismovably linked to both parts. The arrangement of the setting device-2I-22 is such that it is not swung when'changing over from the lowercase shift position according to Fig. 6 to the upper case shift positionas per Fig. 10. The transmission member 32 retains its position in frontof the abutment platesv 30h of key levers h in both case shiftpositions.

For such keys as are also freely selective and at the operation of whichin the base or lower case shift position of the platen a single controlstep and in the upper case shift position Iof the platen a double stepis required, the following arrangement is made.

Whenoperating the keys 28o, the abutment body I5 carrying the abutmentI6 is operated only when the paper carriage 6 with the platen 1 is inthe upper case shift position. For this purpose, extensions 3| (Fig. 4)are provided at the ends 29 of the key levers 25e, and to theseextensions are linked labutment members e which have the shape of shortrods. With their free ends, these rods 30o engage the apertures 4I of atransmission member 40 which has preferably the shape of an angle ironextending across all the key levers 25. The number of apertures 4I inthe angle iron 4D is equal to the number of keys 25, so that connectionis prepared in advance for all keys. levers 38 pivotally mounted on themachine frame at 37 (Fig. 6). One of the levers 38 has a free arm 39which carries an abutment pin 42. When typing in the lower caseshiftposition of the paper carriage, the abutment pin 42V which, at theoperation of key lever 25, is moved in a counterclockwise direction(Fig. 6) by imeans of the abutment member 30e and the transmission member40, moves over the free arm 22 of the setting device 2il-2I-22 as isobvious from Fig. 8. The abutment I5 is not moved when operating in thelower case shift position, and a single step advance movement of thepaper carriage is eiected. When shifting the paper carriage into theupper case shift position (Fig. yl0), the free arm 22 of setting device2li-2 I-22 is brought into the path of the abutment pin 42 so that, uponoperation of a key 23C, the setting device 20--2I-22 is movedcounterclockwise by means of the pin 42 as obvious from Fig. '11, andthe abutment I6 for the movable pawl I4 is adjustedin the alreadydescribed manner. The result of this is a double step when operating thekey 28e and when the paper carriage ls in the upper case shift position.

A fourth possibility ofthe coordination ofthe width of the steps of thepaper carriage and `the keys is that in the lowerlcast shift positiondouble steps and in the upper case shift position single steps areobtained. Upon depressing a key 28d (Fig. 5) the abutment body-I5carrying the abutment I5 is operated only when the paper carriage is inits lower case shift position. In order to accomplish this, theends 29of the key levers 25d are provided with extensions 3|, and the latterwith abutment members 30d. These members consist of rods, the free endsof which en-A gage in the apertures 45 of a transmission member 44 whichextends across all the levers 25d and for which an angle iron ispreferably used. The number of apertures 45 in the member 44 The member40 is mounted on corresponds to the total number of key levers 25.

'I'he lever 43 is provided with` single step advance movement of thepaper 'carfrom Fig. 9, and turns the setting devicel 2Il-2I-22 alsocounterclockwise. Hereby the abutment body I5 is operated in the manneralready described and with the cooperation of the intermediate parts I9,I8, I1, 4B and, with it,

.the abutment I6 for the movable pawl I4 so that' in the lower caseshift position and when depressing the keys 28d a double step of thepaper carriage 6 is produced. In the upper case shii't position, thecross piece 2| of the setting device.

20--2I-22 which is carried by the case shift frame 2 of the machine isremoved from the acting range of the projecting arm 46, as is obviousfrom Fig. 11, so that, in this position, the setting device 20-2I--22and the abutment I5 are not iniiuenced when operating the keys 28d, anda riage 6 is produced.

The ends of the abutment members 30c and 30d extend so far into theapertures 4I, 45 of 'then members 4I), 44 that, when operating themembers 40, 44 by one of the abutment members 30e, 30d, the ends of theother not operated abutment members 30e, 30d move longitudinally withinthe apertures 4I, 45 'and remain in engagement with the members 40, 44.

In order to assure an absolutely reliable and quickly acting adjustmentof the movable pawl I4 at the various case shift operations and widthsof steps of the paper carriage 6, the abutment body I5 carrying theadjustable abutment I6 for the pawl I4 according tothis invention isrotatably carried by the main pawl body II by means v of a bolt 49. Inthe single step position (Fig. 13) the abutment body I5 is held by meansof spring 41 in a position which is determined by the abutment of a nose52 provided on the body I5 against a pin 53 attached to the pawl bodyII. I'he double lever I8 which is also operated by setting device20-2I-22 with the co-operation of connecting member I9 is also rotatablycarried by the same bolt 49 attached to the pawl body II.

When operating certain keys, the abutment body I5 is operated againstthe action`of spring 41 by means of the' double lever I8, the free endI'l of which engages the pin 48 of the abutment body I5 in such a waythat the abutment I6 is always in the plane of the movement of themovable pawl.,I4. This arrangement assures that faulty adjustments areavoided which could easily happen if it were necessary that an especialabutment be moved into the path of the movable pawl It and across thedirection of the movement cf the latter. With the arrangement accordingto this invention, the abutment Iii reliably assumes the desiredposition at the correct moment, also when typing at highest speed.

In the position for double width steps, the movement of the abutmentbody I5 is limited by an abutment 54 provided on abutment body I5 whichcooperates with the abutment part 55 associated with the pawl body II.The movable pawl I d is rotatably connected at 58 to the pawl body IIand abuts, when in rest position according to Fig. 13, i. e., when thepaper carriage standsv still, with one arm 59 on which the spring I3also 'acts against the abutment 60 oi the pawl body II. In this positionthe movable pawl I4 is held by means of the escapement wheel I' whichtries to turn the movable pawl I4 around the fulcrum 58 and against theaction of the spring I3 associated with pawl I4 in clockwise direction(Fig. 13) under the iniluence of the draw spring for pulling the papercarriage. The pawl body II is revolvably carried in known manner by. theshaft 51 which is carried by the two arms I of the case' shiftframe 2.

While I believe the above described embodiments of my invention to bepreferred embodiments, I wish it to be understood that I do not desireto be limited to the exact details of process,

- design and construction shown and described, for

obvious lmodiiications willoccur to a person skilled in the art.

I claim: 1. In a typewriter having a machine. frame, type carriers withdiierent types thereon and means for case shifting the machine to printdiff erent types; paper carriage escapement mechanism comprising anescapement wheel, a rocking spacing device carrying escapement pawlscooperating with said wheel, one of said pawls being Imovable to controlthe spacing distance, an ad- .instable abutment determining the movementof said pawl into different positions corresponding `to differentspacing distances, a setting device for eiecting adjustment of saidabutment, said setting device being movable relatively to the machineframe during case shifting without changlng the position of theabutment, key-actuated parts, and transmission means including actuatorparts exchangeably mounted on selected key-actuated parts, said actuatorparts being operative to actuate the setting device in such a manner asto change the position of said abutment and vary the spacing, and thetransmission means also including a plurality of separately movablemembers each operated by actuator parts on different sets of keyoperated parts.

2. In a typewriter having a machine frame, type carriers 'with differenttypes thereon 'and means for case shifting the machine to printdifferent types; paper carriage escapement mechanism comprising anescapement wheel, a rocking spacing device carrying escapement pawlscooperating with said wheel, one of said pawls being movable to controlthe spacing distance, an adjustable abutment determining the movement ofsaid pawl into diil'erent positions corresponding to diir'erent spacingdistances, a setting device for eiecting adjustment of said abutment andmovably mounted on the case shifting frame,

said setting device being movable relatively to j nism comprising anescapement Wheel, a rocking spacing devicecarrying escapement pawlscooperating with said wheel, one of said pawls being movable to controlthe spacing distance, an adjustable abutment connected to the'settingdevice by a link and determining the movement of said pawl intodifferent positions corresponding to diierent spacing distances, saidrocking spacing device including a pivotable frame in which the movableescapement pawl and the adjustable abutment means are pivoted, a settingdevice for eiecting adjustment of said abutment, said s'etting devicebeing movable relatively tothe machine frame during case shiftingwithout changing the position of the abutment, key-actuated parts, andtransmission'means including actuator parts exchangeably mounted onselected keyactuated parts, said actuator parts being operative toactuate the setting device in such a manner as to change the position ofsaid abutment and vary the spacing.

4. In a typewriter having a machine frame, type carriers with diierenttypes thereon mounted in said frame and means including a case shiftpart for case shifting the machine to print different types, papercarriage escapement mechanism comprising an escapement wheel, a rockingspacing device carrying escapement pawls cooperating with said Wheel,one of said pawls being movable to control the spacing distance,` anadjustable abutment determining the movement of said pawl into diierentpositions corresponding to different spacing distances, a setting devicefor eiecting adjustment of said abutment, said setting device beingmovable relatively to the machine frame during case shifting Withoutchang- 5 ing the position of the abutment, key actuated parts. andtransmission means including actuator parts exchangeably mounted onselected keyactuated parts and a plurality of separately mov'- abletransmission members each operated by acf 1o tuator parts on diierentsets of key-operated parts, said actuator parts being operative toactuate the setting device in such a manner as to change the position ofsaid abutment and vary the spacing, and said transmission members hav-15 ing projections cooperating with the setting device one of whichprojections acts on the setting device only in one case shift positionwhile at least one other projection acts on the setting device only in adifferent case shift position.

` WILLY EISELT.

